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Thermal Degradation of Ternary Blends of Poly(\varepsilon -caprolactone)/Poly(vinyl acetate)/Poly(vinyl chloride)

Sivalingam, G and Madras, Giridhar (2004) Thermal Degradation of Ternary Blends of Poly(\varepsilon -caprolactone)/Poly(vinyl acetate)/Poly(vinyl chloride). In: Journal of Applied Polymer Science, 93 (3). pp. 1378-1383.


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The thermal degradation of ternary blends of poly(\varepsilon -caprolactone) (PCL), poly(vinyl acetate)(PVAC), and poly(vinyl chloride) (PVC) was studied using a thermogravimetry analyzer under dynamic heating in flowing nitrogen atmosphere. PCL degraded in a single stage, whereas the PVAC and PVC degraded in two stages during which acid is released in the first stage followed by backbone breakage in the second stage. The addition of PVC to either PCL or PVAC affected the thermal stability of the blend, whereas the addition of PVAC to PCL did not alter the thermal stability of the blend. In ternary blends, the addition of PVC affected the degradation of PVAC but did not influence the degradation of PCL in the range investigated. The increased addition of PCL to the binary blends of PVC/PVAC decreased the extent of thermal instability of PVAC because of the addition of PVC. The, addition of even 10% PVAC to the PCL/PVC blend removed the thermal instability of PCL resulting from the addition of PVC and can be attributed to the ease of chlorine or hydrogen chloride capture of PVAC over PCL.

Item Type: Journal Article
Publication: Journal of Applied Polymer Science
Publisher: Wiley Periodicals, Inc.
Additional Information: The copyright belongs to Wiley Periodicals, Inc.
Keywords: thermal properties;degradation;blends;acid removal;olefinic breakage
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 23 Nov 2007
Last Modified: 19 Sep 2010 04:21
URI: http://eprints.iisc.ac.in/id/eprint/4049

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